Goldwood GW-8004/8 8" Coaxial Speaker
Best box: 22.4 L bass reflex tuned to 43.4 Hz · F3 64.6 Hz
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Comparable 8.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Goldwood GW-8004/8 8" Coaxial Speaker does not fit your target box volume or tuning. Each entry links to its full enclosure design and Thiele/Small parameters.
⚠️ Engineering Notice for Builders
- Xmax is not published, so the port size is an empirical estimate (area ≥ 12 in² per ft³ of net volume, minimum by driver size), not a displacement calculation. Check air velocity in Load Forge Studio.
- Port length (48.6 cm) exceeds a straight internal run; use an elbow bend, slotted vent or 3D folded duct to fit the enclosure.
Recommended Bass Reflex (Vented)
PORT NEEDS ELBOW / 3D| Net Box Volume (Vb) | 22.4 Liters |
| Tuning Frequency (Fb) | 43.4 Hz |
| F3 (-3 dB Cutoff) | 64.6 Hz |
| F6 / F10 Extension | 55.2 Hz / 43.6 Hz |
| Port Inner Diameter ESTIMATED | Ø 10.0 cm |
| Port Physical Length | 48.6 cm |
| First Pipe Resonance | 354.0 Hz |
| Estimated MOL @ F3 | 103.9 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 0.91 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 1.287; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 28.0 Liters |
| System Q (Qtc) | 1.287 (above Butterworth: Qtc cannot fall below Qts (0.91)) |
| System Resonance (Fc) | 72.3 Hz |
| F3 (-3 dB Cutoff) | 58.7 Hz |
| F6 / F10 Extension | 50.0 Hz / 41.0 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 51.1 Hz |
| Total Q (Qts) | 0.91 |
| Electrical Q (Qes) | 1.2 |
| Mechanical Q (Qms) | 3.77 |
| Equivalent Volume (Vas) | 28.0 Liters |
| Diaphragm Area (Sd) | 214.1 cm² |
| DC Resistance (Re) | 7.6 Ω |
| Efficiency Bandwidth Product (EBP) | 42.6 |
| Linear Excursion (Xmax) | N/A mm |
| Thermal Power (Pe) | 35.0 W |
| Nominal Diameter | 8.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Goldwood GW-8004/8 8" Coaxial Speaker?
Load Forge's calculated alignment puts Goldwood GW-8004/8 8" Coaxial Speaker in a 22.4 liter vented enclosure tuned to 43.4 Hz, reaching an F3 cutoff of approximately 64.6 Hz.
Can Goldwood GW-8004/8 8" Coaxial Speaker be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 28.0 liters with a Qtc of 1.287 (above Butterworth: Qtc cannot fall below Qts (0.91)), the system exhibits an F3 of 58.7 Hz.
What port dimensions should be used for Goldwood GW-8004/8 8" Coaxial Speaker to avoid port chuffing?
Xmax is not published for Goldwood GW-8004/8 8" Coaxial Speaker, so the port is an empirical estimate: a 10.0 cm diameter with a length of 48.6 cm (area at least 12 in² per ft³ of net volume). Check the air velocity at your power level in Load Forge Studio.
Shareable Acoustic Card for Forums & Social Media
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